id focus on just one table at a time...there is too much to consider if you really want to be succussful and you are on a lower level of skill...building a BR on freerolls leads me to believe that is an accurate assessment of your skill level...just a suggestion m8, pros and high skill level players can multi cuz they can consider there odds with one quick glance at the cards.
im not on that level yet and i doubt you are either
When I was in my "Freerolls only" phase (Very bad 5 months about 2 years ago) I built a few decent bankrolls playing mutiple sites for their freerolls. My favorite is bodog $500 freerolls and then pitbullpoker has $25 with under 50 people that i placed in consistently. Also try googling "freeroll script" to find freerolls on a bunch of sites.